The traffic on the design lane of a proposed four-lane rural interstate highway consists of 40% trucks. Ifclassification studies have shown that the truck factor can be taken as 0.45, design a suitable flexiblepavement using the 1993 AASHTO procedure if the AADT on the design lane during the first year ofoperation is 1000, pi=4.2 and pt=2.5.Growth rate= 4%Design life= 20 yearsReliabilitylevel= 90%Standard deviation= 0.45The pavement will be exposed to moisture levels approaching saturation 20% of the time, andwilltake about one week for drainage of water. Effective CBR of the subgrade material is 7. CBR of the baseand subbase are 70 and 22, respectively, and Mr for the asphalt mixture, 450kips/in2.

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Answered: pavement using the 1993 AASHTO…

Engineering

Civil Engineering

pavement using the 1993 AASHTO procedure if the AADT on the design lane during the first year of

Traffic and Highway Engineering

5th Edition

ISBN:9781305156241

Author:Garber, Nicholas J.

Publisher:Garber, Nicholas J.

Chapter13: Evaluating Transportation Alternatives

Section: Chapter Questions

Problem 17P

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The predicted traffic mix of a proposed four-lane urban non-interstate freeway: Passenger cars (4.44kN/axle) = 65% 2-axle single unit trucks (22.2kN/axle) = 24% 2-axle single unit trucks (40kN/axle) = 6% 3-axle or more single-unit trucks (100kN/axle) = 3% 3-axle or tractor semitrailers and combinations (90kN/axle) = 2% The projected AADT during the first year of operation is 4000 (in both directions). If the traffic growth rate is estimated at 4%, the percent of the traffic on the design lane is 43%, pt =2.5, and SN =3, calculate the design ESAL at the design life of 25 years.
The predicted traffic mix of a proposed four-lane urban non-interstate freeway is as follows. Passenger cars = 78% Single-unit trucks: 2-axle, 5,000 lb/axle = 12% 2-axle, 9,000 lb/axle = 4% 3-axle or more, 23,000 lb/axle = 3% Tractor semitrailers and combinations: 3-axle, 20,000 lb/axle = 3% The projected AADT during the first year of operation is 3,900 (both directions). If the traffic growth rate is estimated at 3 percent and the CBR of the subgrade is 7.5, determine the depth of a full- asphalt pavement (in inches) using the AASHTO method and n = 20 years. The resilient modulus of the asphalt (EAC) is 320,000 lb/in². Assume m, for the subgrade is 1 and the percent of traffic on the design lane is 42 percent, p₁ = 2.5, and SN = 4. Use a reliability level of 90 percent, a standard deviation of 0.45, and a design serviceability loss of 2.0. Assume the design lane factor f is 0.42. (Use single-axle load equivalency factors for 2-axle vehicles and tandem-axle load equivalency factors for…
The predicted traffic mix of a proposed four-lane urban non-interstate freeway is as follows. Passenger cars = 78% Single-unit trucks: 2-axle, 5,000 lb/axle = 12% 2-axle, 9,000 lb/axle = 4% 3-axle or more, 23,000 lb/axle = 3% Tractor semitrailers and combinations: 3-axle, 20,000 lb/axle = 3% The projected AADT during the first year of operation is 3,900 (both directions). If the traffic growth rate is estimated at 3 percent and the CBR of the subgrade is 7.5, determine the depth of a full-asphalt pavement (in inches) using the AASHTO method and n = 20 years. The resilient modulus of the asphalt (EAC) is 320,000 lb/in². Assume m, for the subgrade is 1 and the percent of traffic on the design lane is 42 percent, pt = 2.5, and SN = 4. Use a reliability level of 90 percent, a standard deviation of 0.45, and a design serviceability loss of 2.0. Assume the design lane factor f is 0.42. (Use single-axle load equivalency factors for 2-axle vehicles and tandem-axle load equivalency factors for…
The predicted traffic mix of a proposed four-lane urban non-interstate freeway is as follows. Passenger cars = 78% Single-unit trucks: 2-axle, 5,000 lb/axle = 12% 2-axle, 9,000 lb/axle = 4% 3-axle or more, 23,000 lb/axle = 3% Tractor semitrailers and combinations: 3-axle, 20,000 lb/axle = 3% The projected AADT during the first year of operation is 3,900 (both directions). If the traffic growth rate is estimated at 3 percent and the CBR of the subgrade is 7.5, determine the depth of a full-asphalt pavement (in inches) using the AASHTO method and n = 20 years. The resilient modulus of the asphalt (EAC) is 320,000 lb/in2. Assume mi for the subgrade is 1 and the percent of traffic on the design lane is 42 percent, pt = 2.5, and SN = 4. Use a reliability level of 90 percent, a standard deviation of 0.45, and a design serviceability loss of 2.0. Assume the design lane factor fd is 0.42. (Use single-axle load equivalency factors for 2-axle vehicles and tandem-axle load equivalency…
Q: Given the data below: Daily Traffic Count Axle Load (Kips) (2-axle) (3-axle) 22 (4-axle) 40 (5-аxle) 50 (б-аxle) 50 SN is 5, P,34.2, Р,%33, design life is 15 years, growth rate is 2.5%, lane distribution factor = 0.45, AADT = 1600 Calculate the ESAT. 2.
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Please solve this question in step by step in hand- It is transportation-2 Civil engineering Question-4 An six-lane divided highway is to be constructed on a new alignment. Traffic volume forecasts indicate that the average annual daily traffic (AADT) during the first year of operation will be (14002), with the following vehicle mix and axle loads (single axles). Passenger cars (2000 lb/axle) = 60% 2-axle single unit trucks (8000 lb/axle) = 25% 4-axle trucks (12000 1b/axle) = 15% If the expected annual traffic growth rate is 3.5 percent for all vehicles, estimate the design ESAL, given a design period of 18 years using axle load equivalency factor (LEF) tables.
A six-lane divided highway is to be designed to replace an existing highway. The present AADT (both directions) of 6,000 vehicles is expected to grow at 5% per annum. Assume SN = 4 and pt = 2.5. The percent of traffic on the design lane is 45%. (a) Determine the design ESAL if the design life is 20 years and the vehicle mix is: Passenger cars (1000 lb/axle) = 60% 2-axle single-unit trucks (5000 lb/axle) = 30% 3-axle single-unit trucks (7000 lb/axle) = 10% (b) Based on this design ESAL, design a suitable pavement consisting of an asphalt mixture surface with an elastic modulus of 250,000 lb/in2, a granular base layer with a structural coefficient of 0.14, and a granular subbase layer with a structural coefficient of 0.09 on a subgrade having a CBR of 10. Assume all mi values = 1. Use a reliability level of 85%, a standard deviation of 0.45, and a design serviceability loss of 2.0
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The predicted traffic mix of a proposed 4-lane urban non-interstate freeway is: Passenger cars = 78%Single Unit Trucks:2-axle 22.2 kN/axle =12%2-axle 39.9 kN/axle =4%3-axle or more 102 kN/axle =3% Tractor semitrailers and combinations: 3-axle 88.8kN/axle = 3%The projected AADT during the first year of operation is 3900 (both directions). If the traffic growth rate is 3%, and CBR of the subgrade is 7.5%, determine the depth of a full-asphalt pavement using the AASHTO (1993) method and design life of the pavement is 20 years. The resilient modulus of asphalt is 2206 MPa. Assume the mi of subgrade is 1, and percent of traffic on the design line is 42%. Initial serviceability index is 4.5, terminal present serviceability index is 2.5, and SN=4. Use a reliability of 90%, a standard deviation of 0.45.NOTE: All the steps that are followed during the design must be shown and explained clearly. Only number without explanations will not get any credit.
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